After installating the module Commerce_price_table, the admin panel breaks down.
I thought it was this module but after a clean install i tried to install the module path auto and token, and again de admin panels is broken.

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To recreate what we're both seeing, do a fresh install of kickstarter, go to the modules page and click 'submit'. After refresh most commerce modules are disabled as well as many core modules. If you try to enable and save again, you get the error below — the site generally implodes on itself and the only thing that loads on the page is the title and a few menu items and tabs. No body content. You cannot load anything —

FieldException: Attempt to create an instance of field commerce_line_items on bundle commerce_order that already has an instance of that field. in field_create_instance() (line 490 of /[...]/site/modules/field/field.crud.inc).

Just to confirm that this is happening on a fresh vm, fresh kickstart and simply visiting modules and submitting is giving the same error message as above with most of the modules disabling themselves.

I have this error too. I've installed this profile successfully just in the past few days. Today I did a fresh new install with the same steps, simple enough. But I received this error after using module page.

Update: I just did a fresh install with the Zip instead of the .tar and it's working again. If it matters, I'm running a Mac OS 10.7.3 and using Acquia Dev Desktop.

Spoke too soon. Went to add install a module and as soon as I save the configuration, the Commerce Modules were all disabled. Tried to re-enable, one by one and save but each time one or another was in turn disabled again.This happens as soon as any other newly installed module is enabled and "configuration" is clicked.

We are hitting a silly case of shared objects. We are tweaking the information generated by the update module so that it returns information that makes sense to the user, but in the process we are modifying an object that is going to be misinterpreted by the modules page. This bug in Drupal core results in all the modules directly required by Kickstart being disabled when you submit the module page. Ooops.

Here is a patch that solves this issue. After applying it (or disabling the update module) you can follow this procedure to re-enable all the standard modules:

Edit the profiles/commerce_kickstart/commerce_kickstart.info file and add hidden = FALSE at the bottom of it

Visit the module page (admin/modules) and re-submit it (no need to change anything)

Drupal will ask you to confirm to re-enable the modules

Your site will be healthy again

Remove the added line from profiles/commerce_kickstart/commerce_kickstart.info